html {
    scroll-behavior: smooth;
}

body {
    background-color: #000000;
    background-size: cover;
    background-position: center;
    color: #ffffff;
    user-select: none;
    margin: 0;
}

.div-fixid {
    position: fixed;
}

.headerItem {
    margin: 10px;
}


a {
    text-decoration: none;
    user-select: auto !important;
}
a:link {
    color: #7f7fff;
}
a:visited {
    color: #8f8f8f;
}
a:hover {
    color: #aaaa00;
}
a:active {
    color: #ff7f7f;
}
.link-a {
    color: #7f7fff;
}

.header {
    background-color: #313132;
    height: 44px;
    display: flex;
    top: 0;
    left: 0;
    right: 0;
    margin: 0;
    position: fixed;
    z-index: 999;
}
.toc-ignore {}

img {
    display: block;
}

pre {
    width: 100%;
    padding-top: 40px;
    overflow: auto;
    max-height: 400px;
    background-color: rgba(128, 128, 128, 1);
    border-radius: 8px;
    border: inset #ffffff;
    user-select: text;
}

code {
    user-select: text;
}

.toc-link:hover {
    color: #ffffff;
}

.toc-link:active {
    color: #ffffff;
}

.toc-link:visited {
    color: #ffffff;
}



.MathJax_Display {
    overflow-x: auto;
    overflow-y: hidden;
    user-select: text;
}

h1:not(.toc-ignore), h2:not(.toc-ignore), h3:not(.toc-ignore), h4:not(.toc-ignore), h5:not(.toc-ignore), h6:not(.toc-ignore) {
    text-decoration: underline #0000ff solid 5px;
    cursor: default;
}

.heading-show {
    content: "#";
    color: #ffffff;
    cursor: default;
    text-decoration: underline #ffffff solid 2px;
}
.heading-show:hover {
    color: #ffff00;
}
.heading-show:active {
    color: #ffffff;
}
.heading-show:visited {
    color: #ffffff;
}

#back-to-top {
    position: fixed;
    bottom: 40px;
    right: 130px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.translateSelectLanguage {
    top: 10px;
    right: 10px;
    padding: 5px 10px;
    color: #000000;
    z-index: 1000;
}
select {
    background-color: #ffffff;
    border: groove;
    border-radius: 5px;
    cursor: pointer;
}
.no-wrap {
    white-space: nowrap;
}
.no-wrap * {
    display: inline-block;
}
.center-pos {
    transform: translate(-50%, -50%);
}
.center-x {
    left: 50%;
    transform: translateX(-50%);
}
.center-y {
    top: 50%;
    transform: translateY(-50%);
}
.center-all {
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

pre {
    max-width: 90%;
}

.heading-show {
    text-decoration: underline #ffffff solid 2px;
}

.page {
    max-width: 80%;
}
